Grade 9 Integrated Science Review

These flashcards cover fundamental concepts in integrated science pertaining to mixtures, elements, compounds, and the biology of plants and their nutrition.

What are the sub-atomic particles found in an atom, and what are their charges?

Protons (+ve), Neutrons (0), and Electrons (–ve).

What is the relationship between protons, electrons, and atomic number?

Atomic number equals the number of protons, which equals the number of electrons in a neutral atom.

How do you calculate the mass number of an atom?

Mass number (A) equals the sum of protons and neutrons.

What defines an alloy?

An alloy is created by combining two or more elements, usually metals, to form a new material with improved properties.

What property does steel primarily derive from carbon when alloyed with iron?

Strength and resistance to fractures.

What is the primary job of xylem in plants?

Conducting water and dissolved mineral salts from the roots to other parts of the plant.

What are the two main modes of nutrition in living organisms?

Autotrophism and Heterotrophism.

What process allows plants to manufacture their own food using sunlight?

Photosynthesis.

What role do chloroplasts play in photosynthesis?

Chloroplasts are the organelles where photosynthesis takes place.

What is the purpose of the cuticle in leaves?

To minimize water loss and protect inner leaf tissues.

Explain the difference between holozoic and saprophytic modes of nutrition.

Holozoic involves ingesting and digesting solid food, whereas saprophytic feeds on decaying matter.

What type of dentition characterizes mammals?

Heterodont dentition, featuring different types of teeth.

What is the function of guard cells in the leaf?

To control the opening and closing of stomata for gas exchange.